#define  _CRT_SECURE_NO_WARNINGS
#include "test.h"
char* my_strstr(const char* str1, const char* str2)
{
	const char* s1 = NULL;
	const char* s2 = NULL;
	const char* cur = str1;
	if (*str2 == '\0')
	{
		return (char*)str1;
	}
	while (*cur)
	{
		s1 = cur;
		s2 = str2;
		while ((*s1 != '\0') && (*s2 != '\0') && (*s1 == *s2))
		{
			s1++;
			s2++;
			if (*s2 == '\0')
			{
				return cur;
			}
		}
		cur++;
	}
	return NULL;

}
int main()
{
	char str1[] = "abcdefg";
	char str2[] = "bcd";
	char* ret = my_strstr(str1,str2);
	printf("%s",ret);
	return 0;
}